This is the first major text to offer a truly comprehensive review of cognitive science in its fullest sense. Ranging from artificial intelligence models of neural processes and cognitive psychology to recent discursive and cultural theories, Rom Harré offers an original yet accessible integration of the field. At its core, this textbook addresses the question ′How can psychology become a science?′. The answer is based on a clear account of method and explanation in the natural sciences and how they can be adapted to psychological research.